Electric heating device.



W. s. HADAWAY, JR. ELECTRIC HEATING DEVICE. l APPLIOATION PILJQ` SEPT. 1,3.'1911.

Patented June 2, y1914.

Ano/Mfr 20 particularly adapted 30 assume in practice.

UNTED; STATES ZPAIIENT-y vWILLIAM `s.'.:manAWAY, sin, or NEW YORK, ity.

' ELECTRIC HEATING DEVIcE.

Specitcation of vLetters Patr-int. Patented June 2 1914;

Application led September 13,1911. Serial No. 649,124.

ToaZZ lwhom it may concern:

yBe it known that I', IVILLIAM S. HADAWAY, Jr., acitizen of the United States, residing at New York, in the county of New York and State of New York, have invented new and useful Improvements in Electric Heat-- ing Devices, ot' which the following is a full,

clear, concise, and exact Vdescription, reference being had to the accompanying drawing, forming a part of'this specification.

My invention relates .to electric heating devices.

It has among its objects tovprovide an improved electric l eatingdevice wherein the heating unit is in losed in a protectingicasing and the parts of the heater may be readily assembled or disassembled .when desired.

A further object of my invention is to provide an electrical heating device which is to service as -a sol-- dering iron, .wherein an eiiicient heating unit is iiiclosed in a protecting casing which serves to protect the saine from the act-ion of the iuxes and the device may be readily assembled or disassembled.

Other objects and advantages of my iniproied construction will hereinafter appear. In the accompanying drawings I have shown one form which my invention may l My invention is not, however, limited to this speciiic form chosen for purposes of illustration.

In the views'ot these drawings z-Figure 1 shows a side elevation of the heater with to suitable binding posts 8, within a handle" 9'carried upon the en d of the tubular member 3. v

p The heating unit is shown Ain Figs. 1, 2,

fl, and 6. As illustrated in these figures,

ltcomprises a resistance material 10 which is inclosed between sheets of -insulation 11 and incased between sheets of soft metal 12.

In ar preferred form (Figs. 4,' 5 and 6) `I use a reflexed resistance wire, formed of a high resistance alloy such as nickel'chromium or `copper nickel as the resistance material.

wind `the same liatwise on an insulating base and then iiiclose this resistance material between two sheets of inica.. However, other materials may be used it desired. The two metallic sheets 12 which inclose the sheets of insulation may be formed of anv suitable metal having a .sufficiently highl melting point to withstand the heat of the unit and Hwhicln when compressed, is soft enough to receive the harder reflexed resistance inaterial so that the parts of the unit form a single conipactgunitary structure. For example I may use either copper'or laluminum as the materials for these plates. When the unitl is assembled .with the resismnce mi terial iiiclosed between'th'e sheets of insulaa portion of the casing broken away. Fig. f2 heating unit are formed ofs'a plurality of 90 shows a longitudinal sectional view of the fine wires. and these tine wires are intersame. Fig; 3 shows a detail view of the woven with the reflexed material. In a head of the iron. Fig. 1l shows a plan view preferred form the leads are insulated as for of the heating element. and its connecting instance with asbestos as shown at- 13, Fig. 7,

40 lead. Fig.' 5 shows asectional View on line and are preferably inclosed in attubularmeni- 95 5-5 of Fig. 4. Fig. G shows a detail view her Isl, preferably'elliptical in cross section ot the connection of the lead to tlicunit. `as shown in Fig. 7. In apreterredforni Fig. 7 shows a sectional view of the lead. this tubular member 14 is of a sutliciem, In the construction shown in the drawing length to extend from. the heating unit out I have illustrated a lie-ating unit 1, herein? through the tubular member 3 to the end of le@ the handle 9, so that the 4conductors may be brought directly out to the binding posts. In a preferred toi'm the inner end of the tubular member 1l is flattened out to form afterV described, inclosed in an outer shell 2, having a prcject-ing tubular portion 3 of reduced diameter. The tip i.l of a soldering iron having a shank '5A of reduced diameter, is inclosed within the heating unit and held plates 15 shown in Fig. 6, which Aare' coi'nma in position by clamping rings 6 which are pressed upon the corner of the unit.,-A as slipped over th 'casing2 to compre-ss the shown in Figs. 4 and 6, and then brazed to same upon the unit. The terminals of the the metallic inclosing casing of the Y heating unit 1 are led out throughleads 7 Thus a very tight andrugged connection 1s inc loseIi within the portion l3 of the casing 2 made with the unit so that there is no dan- 11s and having struck-iii portions for position-y ince said unit and said tip. l i. In an electric soldering iron, a soldering tip, a heating unit' therefor, a resilient 8. In an electric solderingjiro-m'a soldering tip, a. heating unit therefor, a longitu-y dinally divided casing inclosing the same, and means movable longitudinally 1ofsaid casin forY clamping the latter upon said tip.

9. In an electric soldering iron, a soldering tip, a heating unit therefor, a resilient casing adapted to receive the saine and having a tapered Wall, and a sliding ring movable upon said casing for clamping the parts together.

10. In an electric soldering iron,- 'a soldering tip having a notch in one end thereof, a

heating unit surrounding said tip, and acasing inclosing said heating unit and having means coperating with said notch to position said tip and saidunit.

11. Invan electric soldering iron, a solderi in tip having a shank of reduced diameter, a eating unit surrounding said shank, and a longitudinally divided resilient casing inclosing said heating unit, said shank having struck-in portions for positioning said tip and heating member.

l2. In an electric soldering iron, a soldering tip having a shank of reduced diameter, a heating unit surrounding` said tip, and a 'resilient two-part casing having its parts insulated from each other iiiclosing said tip and unit. I

13. In an electric soldering iro-n, a soldering tip, 'a heating unit therefor inclosed and `sealed in a metallic casing, a second metallic casing integrally united `with VSaid unit casing and acting as a conduit for the leads of said unit, and an outer metallic casing inclosiiig said first-and second mentioned vcasings.

14. In an electric soldering iron, a soldering tip, a heatino` unit therefor inclosed and sealed ina metallic casing, a second metallic casing integrally united with said unit casing and act-ing as a conduitfor the unit leads, an outer'metallic casing inclosing said first and` seco-nd mentioned casings, means for clamping said heating unit and said tip Within one end ofl said outer casing, and a handle carried upon the opposite end of said casing provided with terminal connections for :said heating units. v

In Witness whereof, I have hereunto subscribed my name'in the presence of two Witnesses. a A

` VILLIAM S. I-IADAIVACJ R.

IVitnesses: Y

ik. B. I-IUBBELL, -EDWiN N. LiGH'rrooT. 

